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What kinds of stainless steel are there? What are the differences?

August 15, 2022

Stainless steel is a corrosion-resistant, high-alloy steel with an attractive surface that does not require surface treatment, such as plating or painting.

 

Classification of stainless steel

Stainless steel can be divided into three categories: 400 series, 300 series, 200 series, in daily production life most commonly used 300 series, in a certain range of 400 series and 200 series is a substitute for 300 series, and strictly speaking 400 series because it does not contain nickel elements, not stainless steel but stainless iron, so it can be attracted by a magnet. 200 series and 300 series have nickel, so there is no magnetic, and can not be attracted to iron.



The most common variety in the 300 series is 304, if you come to judge the trend of the whole stainless steel price, you can change the price according to 304. 400 series does not contain nickel, 200 series contains less nickel, 300 series contains the most nickel, so 300 series is the most affected by nickel prices.

 

300 series can be simply divided into 304, 304L, 309S, 310S, 316, 316L, 321, etc.. The distinction is based on the different content of various metal elements of stainless steel has different characteristics, with L indicates low carbon, 304 and 304L difference is the difference in carbon content, also known as low carbon steel, 316 and 316L is also.



Stainless steel form classification

 

Stainless steel can be divided into five categories: plates, coils, sections, tubes and parts, the most important being coils and plates. Profiles are various types of materials made from plates, including flat steel, angle steel, channel steel and I-beam.

 

Features of stainless steel pipe

High pressure and high temperature resistance: whether high or low temperature, will not release harmful substances, excellent material performance is quite stable, stainless steel can work safely under the temperature of -270 ℃ - 400 ℃ for a long time; stainless steel pipe has good ductility and toughness, tensile strength greater than 530 N/mm.

 

Energy saving and environmental protection: stainless steel pipe resistance is small, the inner wall is smooth, reducing the pressure loss, which can greatly reduce the transmission loss. Due to the low coefficient of thermal expansion of stainless steel, it effectively reduces the heat loss of the hot water pipe. Stainless steel material will not cause pollution to the environment, is 100% for recycled materials.



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